Biotite-muscovite-garnet gneiss from the Goochland Terrane in Virginia's Piedmont Province. Estimates of its age vary, but current thinking holds that its protolith is Meso- to Neoproterozoic-aged, and metamorphosed in the Devonian.

Tansil Formation limestone, showing prominent pisolites (large ooid-like primary concretions formed in the supersaturated waters of the backreef lagoon of the Permian Reef complex). Some pisolites were broken and then coated anew in precipitated calcite layers.